US168065A - Improvement in compound balance-staffs for watches - Google Patents
Improvement in compound balance-staffs for watches Download PDFInfo
- Publication number
- US168065A US168065A US168065DA US168065A US 168065 A US168065 A US 168065A US 168065D A US168065D A US 168065DA US 168065 A US168065 A US 168065A
- Authority
- US
- United States
- Prior art keywords
- balance
- watches
- staffs
- staff
- improvement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
Definitions
- the object of my invention is to overcome this difficulty by making a compound staff that is to say, a permanent collet for the balance, and a screw-threaded arbor for the same, said arbor or staif having the pivots turned at the ends, so that when a pivot breaks the staff may be unscrewed from the collet and another inserted in its place.
- Figure l is a vertical section of my compound staff, with the balance-wheel on the collet; and Fig. 2 is an elevation of the staff alone, both figures being greatly enlarged to show the construction.
- A represents the staff proper, having the pivots a turned at the ends, and a shoulder, b, near the middle to carry the roller, above which shoulder the staff is screw-threaded, as at c, to the end.
- B is an internally-threaded sleeve or collet,
- the sleeve is turned to three different diameters, forming two shoulders, cl 0; on the former the hub of the balance 0 rests, the sleeve forming its permanent collet, while the hair-spring collet (not shown) rests upon the shoulder e.
- PETER KREUTER J. G. JAMES.
Description
THORNTON.
Compound Balance-Staffs for Watches. No. 168,065. Pat ented Se pt.21',I875.
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UNITED STATES JOHN J. THORNTON, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF HIS PATENT OFFICE.
RIGHT TO DAN H. RIDGWAY, OF SAME PLACE.
IMPROVEMENT IN COMPOUND BALANCE-STAFFS FOR WATCHES.
Specification forming part of Letters Patent No. 168,065, dated September 21, 1875; application filed May is, 1875.
To all whom it may concern:
Be it known that I, JOHN J. THORNTON, of Cleveland, in the county of Ouyahoga and State of Ohio, have invented an Improved Oompound Balance-Staff for Watches, of which the following is a specification:
Among watch-makers it is recognized as a fine piece of work to put new pivots in a balance-stafi without disturbing the adjustment of a fine watch, and a still more difficult undertaking to replace the entire balance-staff without injury to the time-keeping qualities of the watch.
The object of my invention is to overcome this difficulty by making a compound staff that is to say, a permanent collet for the balance, and a screw-threaded arbor for the same, said arbor or staif having the pivots turned at the ends, so that when a pivot breaks the staff may be unscrewed from the collet and another inserted in its place.
Figure l is a vertical section of my compound staff, with the balance-wheel on the collet; and Fig. 2 is an elevation of the staff alone, both figures being greatly enlarged to show the construction.
In the drawings, A represents the staff proper, having the pivots a turned at the ends, and a shoulder, b, near the middle to carry the roller, above which shoulder the staff is screw-threaded, as at c, to the end. B is an internally-threaded sleeve or collet,
' screwed onto the stafi until arrested by the shoulder b. The sleeve is turned to three different diameters, forming two shoulders, cl 0; on the former the hub of the balance 0 rests, the sleeve forming its permanent collet, while the hair-spring collet (not shown) rests upon the shoulder e.
If the watch-maker has a watch to repair with the pivots of this compound stafi' broken, a new staff can be put in about as easily as a new. second-hand would be, and with a certainty of not disturbing the adjustment ofthe balance, it being understood, of course, that he is supplied with spare staffs of this construction.
'What I claim as my invention is The compound ba-lance-stafi' for watches described, consisting of the stafi' proper, A, having the pivots turned on its ends, and a shoulder near its middle, above which it is screw-threaded, and the internally-threaded sleeve or collet B, which screws onto the said staff proper until it abuts against the said shoulder, the said sleeve or collet B being provided with shoulders d e, for supporting ,the hub of the balance O and the hair-spring collet, substantially as described and shown.
JOHN J. THORNTON. Witnesses:
PETER KREUTER, J. G. JAMES.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US168065TA | 1875-05-18 | 1875-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US168065A true US168065A (en) | 1875-09-21 |
Family
ID=32848710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US168065D Expired - Lifetime US168065A (en) | 1875-05-18 | 1875-05-18 | Improvement in compound balance-staffs for watches |
Country Status (1)
Country | Link |
---|---|
US (1) | US168065A (en) |
-
1875
- 1875-05-18 US US168065D patent/US168065A/en not_active Expired - Lifetime
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